Organic light emitting device and method for manufacturing the same

Abstract

A light emitting diode includes a substrate, a first bottom electrode, a first top electrode, a second top electrode, and a blocking structure. The first bottom electrode is disposed on the substrate. An organic light emitting layer structure is disposed on the first bottom electrode. The first top electrode and the second top electrode are disposed on the organic light emitting layer structure. The blocking structure is disposed on the substrate, wherein the blocking structure has a trench, and wherein the first top electrode and the second top electrode are separated from each other by the blocking structure.

What is claimed is: 
     
         1 . An organic light emitting device, comprising:  
       a substrate;  
       a first bottom electrode disposed on the substrate;  
       an organic light emitting layer structure disposed on the first bottom electrode;  
       a first top electrode and a second top electrode disposed on the organic light emitting layer structure; and  
       a blocking structure disposed on the substrate, wherein the blocking structure has a trench, and wherein the first top electrode and the second top electrode are separated from each other by the blocking structure. 
     
     
         2 . The organic light emitting device according to  claim 1 , wherein the blocking structure comprises a plurality of blocking strips separated from each other by the trench. 
     
     
         3 . The organic light emitting device according to  claim 2 , wherein the organic light emitting layer structure comprises:  
       a first organic light emitting layer disposed between the first bottom electrode and the first top electrode;  
       a second organic light emitting layer disposed between the first bottom electrode and the second top electrode, wherein the first organic light emitting layer and the second organic light emitting layer are separated from each other by the trench. 
     
     
         4 . The organic light emitting device according to  claim 2 , wherein the first top electrode and the second top electrode have an extension direction substantially parallel to an extension direction of the trench. 
     
     
         5 . The organic light emitting device according to  claim 2 , wherein the organic light emitting layer structure comprises:  
       a first organic light emitting layer and a second organic light emitting layer, wherein the first top electrode and the second top electrode are disposed on the first organic light emitting layer and the second organic light emitting layer, respectively;  
       a plurality of first organic material layers disposed on the blocking strips. 
     
     
         6 . The organic light emitting device according to  claim 5 , wherein the organic light emitting layer structure comprises a second organic material layer disposed in the trench. 
     
     
         7 . The organic light emitting device according to  claim 1 , wherein the trench has an extension direction substantially perpendicular to an extension direction of the first bottom electrode. 
     
     
         8 . The organic light emitting device according to  claim 1 , further comprising:  
       a pixel defined layer disposed on the substrate between the first top electrode and the second top electrode, wherein the blocking structure is disposed on the pixel defined layer. 
     
     
         9 . The organic light emitting device according to  claim 1 , further comprising:  
       a pixel defined layer disposed on the substrate between the first top electrode and the second top electrode, wherein the trench of the blocking structure is recessed toward an inside of the pixel defined layer. 
     
     
         10 . The organic light emitting device according to  claim 1 , further comprising:  
       a pixel defined layer disposed on the substrate between the first top electrode and the second top electrode, wherein the pixel defined layer partially extends onto the blocking structure. 
     
     
         11 . The organic light emitting device according to  claim 1 , wherein the blocking structure has a cross sectional width tapering toward the substrate. 
     
     
         12 . The organic light emitting device according to  claim 1 , wherein the trench exposes a top surface of the first bottom electrode. 
     
     
         13 . The organic light emitting device according to  claim 1 , comprising:  
       a plurality of the trench, wherein at least two of the trenches have different widths. 
     
     
         14 . A method for manufacturing an organic light emitting device, comprising:  
       providing a substrate;  
       disposing a first bottom electrode on the substrate;  
       forming a blocking structure on the substrate;  
       forming a trench in the blocking structure;  
       forming an organic light emitting layer structure on the first bottom electrode and the blocking structure; and  
       forming a top electrode material layer over the blocking structure and the substrate, such that the top electrode material layer is cut off by the blocking structure to form a first top electrode and a second top electrode that are separated from each other. 
     
     
         15 . The method according to  claim 14 , further comprising:  
       forming a pixel defined layer on the substrate and partially covering the first bottom electrode; and  
       forming the blocking structure on the pixel defined layer, wherein the top electrode material layer is cut off by a height difference between the blocking structure and the pixel defined layer. 
     
     
         16 . The method according to  claim 15 , further comprising:  
       forming the trench in the blocking structure and further extending the trench into the pixel defined layer by an etching step. 
     
     
         17 . The method according to  claim 14 , further comprising:  
       forming a pixel defined layer on the substrate and partially covering the first bottom electrode and the blocking structure, wherein the top electrode material layer is cut off by the trench. 
     
     
         18 . The method according to  claim 17 , wherein forming the pixel defined layer is carried out after forming the trench.